LM3485 - 4.5-35V、滞后非同步 PFET 降压控制器

LM3485是TI德州仪器公司的一款控制器（外部开关）产品，LM3485是4.5-35V、滞后非同步 PFET 降压控制器，本站介绍了LM3485的封装应用图解、特点和优点、功能等，并给出了与LM3485相关的TI元器件型号供参考。

LM3485 - 4.5-35V、滞后非同步 PFET 降压控制器 - 控制器（外部开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM3485 is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, low cost, switching buck regulator for a wide range of applications. The hysteretic control architecture provides for simple design without any control loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultra-low dropout, 100% duty cycle operation. Another benefit is high efficiency operation at light loads without an increase in output ripple.

Current limit protection is provided by measuring the voltage across the PFET’s RDS(ON), thus eliminating the need for a sense resistor. The cycle-by-cycle current limit can be adjusted with a single resistor, ensuring safe operation over a range of output currents.

产品特性

Easy to Use Control Methodology
No Control Loop Compensation Required
4.5V to 35V Wide Input Range
1.242V to VIN Adjustable Output Range
High Efficiency 93%
±1.3% (±2% Over Temp) Internal Reference
100% Duty Cycle
Maximum Operating Frequency > 1MHz
Current Limit Protection
VSSOP-8

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